<Page> Exhibit 23.3 JAAKO POYRY JP MANAGEMENT CONSULTING JAAKKO POYRY CONSULTING 580 White Plains Road Tarrytown, NY 10591-5183 USA Tel. +1 914 332 4000 Fax +1 914 332 4411 Date November 22, 2002 Page 1 Dear Sirs, We hereby irrevocably consent to the use of our firm's name, and the references to the report, data and information supplied by us, in the registration statement on Form F-4 of MDP Acquisitions plc (the "ISSUER") and any amendments thereto, filled with the Securities and Exchange Commission for the registration of the Issuer's E350,000,000 10 1/8% Senior Notes due 2012 (and the guarantees thereof), $545,000,000 9 5/8% Senior Notes due 2012 (and the guarantees thereof), E100,000,000 15.5% Subordinated Notes due 2013 and $150,000,000 15.5% Subordinated Notes due 2013. Sincerely yours, JP MANAGEMENT CONSULTING (NORTH AMERICA), INC. By: /s/ John Wissmann --------------------------------- Name: John Wissmann Title: Principal